Liquid scale.



A. S. DYSAHT;

LIQUID SCALE. APPUcATloN nLrn mums. isn.

1,279,304. Intente@sept'. 17,1918.

El ff" JV /Sf i m6- 0W To all whom it may concern:

"3 measured.

ArurnntsS DYsARnoriTHE UNI'rEDfsTATEs NAVY.

PArunrorrlon LIQUID scam.

Be it -knonn that LA RTHUR S. DYsAnfr; lieutenant, junior grade, in the United States`l Navy, a citizen of the United States, have invented certainV new and useful Improve"-f ments inLiqnid Scales, of which the'folloivfy ing isa specifi'cation;'`

This invention relates to that lclass. "of scales which relies" upon the height cfal liquid column 'to' indicate the Weightbein" Scales of vthis character generally.

a plunger operating in 'a Vcylinder and rest-'' ing upon a fluid. int-his general type scale there is liability of considerablefrici' tion between the plunger and the cylinder, dueto the'vvide surface of the formel" and the liability of the pail'jtsto get outof aline?i ment. Furthermore, scales of this character have heretofore been' defective l'because their "i accuracy is dependent upon the amountof liquidemployed. y. 4 A

My1`nventionhas` for its' object the elimi l nation of the foregoing, and'other, defects inhering in liquid scales and to provide an'y improved scale vvh'erein the plunger has only a line "contact with the cylinder, thereby .preventing binding;v fu1"th er, to` mount the liquid sightr tube'v and scale directly 'onf'thei movinglelement, the plunger, thus' making accuracy 'offthe scale entirely independe monster liquid enpiyeda Prefi erably, n'iereury "v'villbfe used as' theliquid on which' the plunger rest'sand forced up into the 4sight'tube to indicate, 'in

ent o f th connection With 'the' jgraduations on I"tl'ie scale carried by the" pluiigeigfthen Weight `which isbeing measured'bythe device.

The' cup or cylinderl "and the plunger are made of 'steel or somesubs'tancevvhich vvill `not bfe Wetbyfmercury.`^ "By providingfia radial clearance between the periphery of the plunger and the interior'wall of the'` c up 'Ot Say, 00.04; arreslsureoilbout .30T '0i mercuryV 'will' be held. Vhave by experiment that a clearance ofthis hari I'acter will `prevent the plunger from binding in the cup. The plunger may assumethe formiof a thin disk,`or`, vit may be relatively thick and provided with a periphery which is rounded or approximately 'sf'p 'h e r1cal. l spherical contact "edge Will prevent binding 'on the v'vall' of the cupl 'whetherthe 'plunger i`s,for\ is' not, setsquarely. A lubricant, for instance cylinder" oi l, is provided inthe an nulai'is'p'ace around' the 'plunger' and above Y speciaatimi'ir Lette'rsraten'u Patented Sept-17,1918w-' Application meaun'efs, isifzi "serial No. 176,789.

the line contact portion of the periphery :i

thereof.

To prevent the possibility of friction bef; v

tween the plunger and the cup, van improved one-point support, for instance a ball, is provided so that the mechanism will be'self i alining. The embodimentiof the invention herein-' after set forth is to be; considered as illustrai tive, rather' than restrictive, of the scope' thereof, 'asf modifications may be resorted to Without departing from the essential prin;i

ciplesV ofthe invention;

The accompanying 4drawing is a vertical elevation with certain parts broken away,

and'others 'in section, showing .one embo'di.1

ment' v4of the invention. Y

The cup 'or cyliniiler is' shownat 1 and the plunger at 2. A'glasssight tube?)` is seit` into the plunger and carried thereby, the"l interior thereof con'imunijca-ting with a port 4 leading to the lower'face ofthe plungerg A suitablygraduated scale 5 is carrieds by to, as any line edge or periphery Willj serv e the4 purpose' of preventing' of lthel plunger 2 on thefcup 1.' 1n practice, I have '5 found'thet'- if a clearance' of .OOOfLf is' 'pro` vided between the line contactjedg'e 8 and the interior. wall 'ofy E the cup vl, a pressuref of `about 30 4of 'mercury will be retained Without' passing up vva'rdly'l"beyond"` the edge 8.x 'lfhe'pluner 2 is of smaller diameter above' the line e ge 8 and the space 9 is filled with a' lubricant,l for instance, cylinder oil, which lubricates' the piston and prevents corrosion; n

I prefer to make the plungery 2 andjfcup 1 `of, steel, because mercury v'vill not Wet such aV material. I do not, however, limitmyself to the use of steel, as any other .I'n'ateral' having the aforementioned.' property will serve thei'iu'rpo'se.- t f The p lun er 2 may be a thin disk instead ofthe relatively thick plunger shown. purpose is to provide aline Contact between the ing and'tominiize friction.'

plunger and the cup gto 4 preventbindty vg @u @estela-'5., inditataslf 21 having a connectie` t9 bolt 1 9.

A Braekel: 10 sleclirledito suitable'f'sipl port is provided with an iup-turned' end ,1'1"

having a one-point supporutlgforzthe.cup;

l. A needle point may be provided, but I have shown a single ball 13 seated incavities in the portion l1 and the cup for?. that pimpose This bearing causes -1 the5 device to be selaliniligA and eliniinateg, lateral pressure and acconpa-nying friction'.n The-.011.111 extensie dawlmalndly, die tout, of a Screw-threaded,tubular 'nipple prg, vided. with, a can, and llafipg a SlQtiil i relce'vee 'the end ot' the,

allegation. me; 0l. the. planea 2- 11a-Sii screw-'threaded boss 17. A yoke 18 haengt; iniatually. Streu-threaded-ywliahieqeives the, Q .SA 17.-. Ss'rvie'cliatthe leiter Baril, Qf. the! vlo '184 is' aibQlt .1,9.; which Theobject tobeweigl ed, ei Q suepend by the rod'Ql'f, the is l milled omaggi .die Yaka lsau plunge@ i6-ille tlalaltet un@ i. 'it upwatflli 'and Sight tube tlm-mercury, qolilmu the devis.. Qn

@Mlle rillingen@ $0.- that they. fue bOdi earned. lhtlly; f makes; the, asicura'cy .Q the scale entire y in ependent of Athe amount lqudereeleyesl Hula summing e. Serious dei' Qt. 'beluft-ire; iefldeatfto lmlidi Scalea.

i Melua-f Eli-.Plilllee Willi h... make .enla a liaecqata, wat. e, ulm la..- or. @Halimi legni @erlangte y0ff the. exlmleaisreadere all@ el. @lenient 'at G14-:eey layllauld.Saalatlwa olv.. "atedn .that @nasceva .the #111919? 0 .-af .lineal Snell as rilettura Wlilaliwll not wflhist el of.' inl-alma. @alla al@ plunge agli tematici@ l'defalilepreaauree;

.Il.1s...w. 1ll1.;z aait. of, my mamita -I el llatlilu' pllwgew? the @Mutha met: el Sightjtilbe 31 aufl- Scale ,batir earned by, au@ meveblewt, .it-lather@ @if thaw@ @lamenta thevplimgi Q1; cylinder; @na-tantes. the movableelemfmt ou"the,d eViQm1 i'.

betweefi the Cilinder andf plunger;

L audi@ Hammamet.SiglltgtlbG-@Ildfgraduated scale bdliy daylight alla', melbi@ wat,

ableieleI lent.l il. Ai liquid Seale'comprisng @weer @vll mQvablleB'element ot the, soale the V'movable'l element aforesaid, the `scale being arranged for direct reading thereon from theliqui'dv` in the-sight tube.

2. A liquid scale comprising a cup or cylinder-fa liquid contained therein, a plunger operable Within the cup and resting upon th'eliquid; a transparent sight tubebodily carried by, and, movable with the plunger andl in communication Withthe liquid aforesaic, whereby theflq .iewr l.,t, loro up, into .Said tube,` i scaldedirriiied. by tlg plunger. anclniovable therewith, arranged ,or direct, reading thereon from the liquid muiQ-SighMubQL.'

liquislfsale coulpringfa @up 01* Cyl-.f inder, and a plunger operabletherein Whiq; has a line: Contact, therewith, one of: said pants conetituting the mmtble elenient, of the Scale. the plunger and the cup or cy'linden,n thel movable element. by the pre/Sure ei'eitd: 0h theliquid being'. adap'tedjto cause the latter, to, indicate thefweight acting on, said.movey indem. and., a plungel @QF-@bl tllelleil Whlfll hes-alia@ @met t erwifhhon-Qfl ,Said-.tarte con ,titutin the` movableelementl of .t 'e

Sfa. e, a. @liquid nterped' betwen, 'th l. cup or. cylindela trallS plunger. and th parent sight tu e carried by, and,l nuo.rablel with the movable element and ariangeh4 to rleve. the/liquidi and@ Seal@ Carried by. the mova-ble. eleineriu'. vsith. Awhich the hq @Olunineredint Seidl Sght'wbeie ad@ .ile tdregislter vto indicateby: direct readllglgggl the, liquid, columnI onto hthe= scale the. weight tot .Whi 1, the mpvgable elemeuts Sulllfztlr a freel liquid. interpoeed between ind, i; au ai .plunger Qpfirabl theizem, will@ hat: a lie. @.Qatatlhtaewti .une Oi; Sai.. @maui-mg; fh@ ambt. elena@ Qi t Suela @liquid i'llterpa$d-..hetueenl the' plunge; aad. cui. posfseSseg anon-wetting Prpebtyi, and means.- fpr 'indqating .the Weight to which, theV inovable f element isieub.; ject by, the: pressure exerted, by Said movable elemllll- @il they IQIifWett-ing liilllifll aforesaid. 1 6.- 2! liquid; Saleompi'lingfa- @up 0n-Cyl,- indrf' ansia pltngenhrng. Contact pe? rphryof; rounded 0'1'! Substantially Salieri: forni; S20-'that tWiIl fit the cupor cylin; der Wilhout, binding, thus, constituting a, liiie @patata Que. Qi Sa-l parts nlQli-lbtl @1Q-m99?, 0f the Scale. ai free., lqlllll interposed, betweqn-.theplungen and; theup on. c yiliniler,` an weight. indicating mean Qonllilldfbyte pnesure exerted? on,` liqiiidby theunovable element aforesaid; f 7. A liquid Scale, fconiprieing a cup', and lunger, the ,la-tteisgliaving. aline 'contactwitb $191139., Que. of Said :parte` conetitutingliie p A al freegliquid lllterpQ'Se-d between the C1111 wid' Cylnde constituting the t.

iiio

which the movable element is subject, and means for lubricating the plunger to prevent corrosion of the plunger and cup.

8. A liquid scale comprising a cup and plunger, the latter having a line Contact with the cup, one of said parts constitutin the movable element of the scale, a free llquid interposed between the cup and cylinder which is adapted to indicate the weight to which the movable element is subject, and a lubricant contained Within the cup above the liquid aforesaid, said lubricant being adapted to lubricate the plunger and prevent corrosion of the plunger and cup.

9. A liquid scale comprising a cup or cylinder and a plunger, one of which constitutes the movable element of the scale, a scale, a liquid interposed between the lunger and the cu which is adapted to indicate on the scale tie Weight to which the movable element is subject7 and a guide arranged er and cup adapted ative position and point support for the elements aforesaid,V

whereby they are adapted to automatically aline their axis of motion with that of the impressed force to thereby minimize lateral pressure on the relatively movable cup and plunger and the friction resulting therefrom.

In testimony whereof I hereunto affix my signature.

ARTHUR S. DYSART.

Uopiel of thll patent may be obtained for nve cents each, by addressing the Commissioner of Patents.

' Washington, D. C. 

